Major Sources:

Ovid, Metamorphoses 4.55-166 (Bech, Skeat, Shannon)

Ovide moralisée (a.k.a., Norman Piramus et Tisbé) (Meech) (translation, by MFV)

Minor details(?):

Boccaccio, De claris mulieribus 12

Others:

Lactantius, (Meech)

Machaut, Le Jugement dou Roy de Navarre, 3171-86.

Flamenca, 621
 

English Contemporaries:

Gower, Confessio Amantis 3.1331-494

Chaucer	Ovid, Metamorphoses	Piramus et Tisbé (Ovide moralisée)	Boccaccio, De claris mulieribus	Others
706-923	4.55-166	Meech; Delany
706	4.58, 99	4.229 (=1) Meech	Ch. 12 (title, and opening lines)	Machaut, 'Le lay amoureux' 150-51; Lactantius (Meech)
711	Cf 4.61 (Shannon)	4.230-32 (=2-4)
726-29		348-51 (=119-22)
735	4.64			Whiting G154; cf Troilus 2.538-39
737-57	Cf. 4.65-73
742	4.68
773-74	4.81-82
785-88	4.88-90 (Shannon)	819 (Delany) (=589)
790	4.84	820 (Delany) (=590)
811	4.100
813		901ff (Delany) (=671)
830-32	Cf 4.106-7 (Shannon)
850-52	4.119-26	1052 (Delany) (=822)
855-57	Cf 4.128 (Shannon)		p.26 (in Guarino trans. (Frank)
862-63				Cf. Geoffrey of Monmouth, History 9.11 (Delany)
869-82	Cf. 4.137-44 (Shannon)
885	4.145
917-18				Cf. RR 14145